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Poisson's Effect

Density of ru...

Question

Density of rubber is d. A thick rubber cord of length L and cross-section area A undergoes elongation under its own weight on suspending it. This elongation is proportional to

A

d L

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B

A d / L

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C

A d / L^{2}

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D

d L^{2}

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Solution

The correct option is B $d L^{2}$
Increment in length $l = \frac{d L^{2} g}{2 Y}$

$∴ l \propto d L^{2}$

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